Re: destination load balancing

[Martijn Lievaart <m@rtij.nl>]

Radovan Jablonov wrote:

>Hello,
>
>Has iptables possibility (or will have) to use other load balancing
>methods/algorithms (for example: weighted round-robin, hash, load agent,
>custom algorithm)?
>  
>
No, not directly.

If you can set a fwmark based on some criterium you could implement more 
advance schemes, but that requires some custom match the YOU have to write.

So a hash based load balancing could be implemented faily easily, just 
write a module that sets fwmark based on the hash. I guess more people 
would be interested in this . (If only to load balance over multiple 
links, f.i.).

Load balancing based on some kind of load agent would be more difficult, 
one has to communicate with userspace for this. I imagine many people 
would be interested in this.

Weighted round robin is actually fairly easy by using the nth match. 
lets say you want 2/3 go to A and 1/2 3 go to B. Just use nth to devide 
in 3's and send cases 0 and 1 to A and case 2 to B.

M4